Okay, now this one VS a J&J Flat line on a 98 custom..I wonder if I should stick with it or snag the J&J. When i was messing around with it a few shots seem to just whip left, right, up, and I down. I tried turning down the velocity a bit but it didn't help much. I basically want to be able to hit an 8 inch target from like 20 yards. Is that too much to ask from a Tippmann with an RT kit and the Smart Parts barrel?

therefore:
if your paint is old/low quality it will throw curve balls
if your barrel is dirty it will throw curve balls
if your paint is a .684, and your barrel is a .690(which it probabally is) it will throw curve balls

I have never used any barrels but smartparts, Dye and CP in the last 20 years(except if the marker had a fixed barrel).

Okay, now this one VS a J&J Flat line on a 98 custom..I wonder if I should stick with it or snag the J&J. When i was messing around with it a few shots seem to just whip left, right, up, and I down. I tried turning down the velocity a bit but it didn't help much. I basically want to be able to hit an 8 inch target from like 20 yards. Is that too much to ask from a Tippmann with an RT kit and the Smart Parts barrel?

the quality of paint will make a bigger difference than your barrel. if its egg shaped and dimpled no barrel is gonna make it fly straight lol. id stick with the one you have vs. buying the J&J. smart parts made pretty nice barrels.